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Dol J, Hughes B, Bonet M, Dorey R, Dorling J, Grant A, Langlois EV, Monaghan J, Ollivier R, Parker R, Roos N, Scott H, Shin HD, Curran J. Timing of neonatal mortality and severe morbidity during the postnatal period: a systematic review. JBI Evid Synth 2022; 21:98-199. [PMID: 36300916 PMCID: PMC9794155 DOI: 10.11124/jbies-21-00479] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE The objective of this review was to determine the timing of overall and cause-specific neonatal mortality and severe morbidity during the postnatal period (1-28 days). INTRODUCTION Despite significant focus on improving neonatal outcomes, many newborns continue to die or experience adverse health outcomes. While evidence on neonatal mortality and severe morbidity rates and causes are regularly updated, less is known on the specific timing of when they occur in the neonatal period. INCLUSION CRITERIA This review considered studies that reported on neonatal mortality daily in the first week; weekly in the first month; or day 1, days 2-7, and days 8-28. It also considered studies that reported on timing of severe neonatal morbidity. Studies that reported solely on preterm or high-risk infants were excluded, as these infants require specialized care. Due to the available evidence, mixed samples were included (eg, both preterm and full-term infants), reflecting a neonatal population that may include both low-risk and high-risk infants. METHODS MEDLINE, Embase, Web of Science, and CINAHL were searched for published studies on December 20, 2019, and updated on May 10, 2021. Critical appraisal was undertaken by 2 independent reviewers using standardized critical appraisal instruments from JBI. Quantitative data were extracted from included studies independently by 2 reviewers using a study-specific data extraction form. All conflicts were resolved through consensus or discussion with a third reviewer. Where possible, quantitative data were pooled in statistical meta-analysis. Where statistical pooling was not possible, findings were reported narratively. RESULTS A total of 51 studies from 36 articles reported on relevant outcomes. Of the 48 studies that reported on timing of mortality, there were 6,760,731 live births and 47,551 neonatal deaths with timing known. Of the 34 studies that reported daily deaths in the first week, the highest proportion of deaths occurred on the first day (first 24 hours, 38.8%), followed by day 2 (24-48 hours, 12.3%). Considering weekly mortality within the first month (n = 16 studies), the first week had the highest mortality (71.7%). Based on data from 46 studies, the highest proportion of deaths occurred on day 1 (39.5%), followed closely by days 2-7 (36.8%), with the remainder occurring between days 8 and 28 (23.0%). In terms of causes, birth asphyxia accounted for the highest proportion of deaths on day 1 (68.1%), severe infection between days 2 and 7 (48.1%), and diarrhea between days 8 and 28 (62.7%). Due to heterogeneity, neonatal morbidity data were described narratively. The mean critical appraisal score of all studies was 84% (SD = 16%). CONCLUSION Newborns experience high mortality throughout the entire postnatal period, with the highest mortality rate in the first week, particularly on the first day. Ensuring regular high-quality postnatal visits, particularly within the first week after birth, is paramount to reduce neonatal mortality and severe morbidity.
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Affiliation(s)
- Justine Dol
- Faculty of Health, Dalhousie University, Halifax, NS, Canada,Aligning Health Needs and Evidence for Transformative Change (AH-NET-C): A JBI Centre of Excellence, Dalhousie University, Halifax, NS, Canada
| | - Brianna Hughes
- Aligning Health Needs and Evidence for Transformative Change (AH-NET-C): A JBI Centre of Excellence, Dalhousie University, Halifax, NS, Canada,School of Nursing, Dalhousie University, Halifax, NS, Canada
| | - Mercedes Bonet
- UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Sexual and Reproductive Health and Research, World Health Organization, Geneva, Switzerland
| | - Rachel Dorey
- School of Nursing, Dalhousie University, Halifax, NS, Canada
| | - Jon Dorling
- Division of Neonatal Perinatal Medicine, Department of Pediatrics, Faculty of Medicine, Dalhousie University and IWK Health Centre, Halifax, NS, Canada
| | - Amy Grant
- Maritime SPOR Support Unit, Halifax, NS, Canada
| | - Etienne V. Langlois
- Partnership for Maternal, Newborn and Child Health, World Health Organization, Geneva, Switzerland
| | - Joelle Monaghan
- Centre for Research in Family Health, IWK Health Centre, Halifax, NS, Canada
| | - Rachel Ollivier
- School of Nursing, Dalhousie University, Halifax, NS, Canada
| | - Robin Parker
- W.K. Kellogg Health Sciences Library, Dalhousie Libraries, Dalhousie University, Halifax, NS, Canada
| | - Nathalie Roos
- Clinical Epidemiology Division, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Heather Scott
- Department of Obstetrics and Gynecology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Hwayeon Danielle Shin
- Aligning Health Needs and Evidence for Transformative Change (AH-NET-C): A JBI Centre of Excellence, Dalhousie University, Halifax, NS, Canada,School of Nursing, Dalhousie University, Halifax, NS, Canada
| | - Janet Curran
- Aligning Health Needs and Evidence for Transformative Change (AH-NET-C): A JBI Centre of Excellence, Dalhousie University, Halifax, NS, Canada,School of Nursing, Dalhousie University, Halifax, NS, Canada
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